Centrifugal concentrator



Patented June 4, 1935 OENTRIFUGAL CONCENTRATOR Curtis 0. Baldwin and Verne s. Miller, Ottawa, Kans..

Application July 29, 1933, Serial No. 682,759%

6 Claims.

This invention relates to centrifugal separators and primarily to a concentrator." The object of the invention is to provide means for separating the values or concentrates from the baser materials. Centrifugal concentrators have been used heretofore but-we provide an efficient means for separating the'so called concentrates or values from the refuse or baser materials and we further provide means for taking off any predetermined amount of the concentrates by means of a hollow plow or slicer. I I

The novelty of the invention will be understood by reference to the following description in connection with the accompanying drawing in which:

Fig. 1 is a vertical, longitudinal, sectional view through a concentrator constructed in accordance with our invention; and

Fig. 2 is a fragmentary plan view of the concentrate chamber and a part of the plow or slicer.

Referring now to the drawing by numerals of reference, I designates a conical base having bearings 2 and 3 at its respective ends, in which is mounted a tubular shaft 4 carrying a cone support 5, supporting a cone 6 closed at its respective ends and cooperating with an outer cone 1 to form a passageway 8. The cone 7 is carried by a cylindrical inlet member 9 fastened to a head I!) through the medium of the bolts l. The head or collar H2 is secured to a shaft 12 by set screws l3. The shaft [2 is mounted in bearing 14 at the upper end of the hollow shaft 4 and it extends downwardly within the hollow shaft through the base I to provide an end l5 by means of which driving mechanism may rotate the shaft to rotate the cone 1 in a direction opposite to the direction of rotation of the shaft 4 and cone 6. The shaft 4 may be driven by any suitable means as for example by the pulley IE or by gearing in an obvious manner.

The lower end of the cone support 5 carries a series of radial blades ll which are located in a spiral chamber 18 carried by the base I through the medium of the braces I9 and bolts 20. The outlet for the chamber 18 is not shown but since it is of the snail shell type its construction will be well understood. The cone I carries a shelf 2! which is L-shaped in cross section, the horizontal flange 22 being spaced from the bottom of the cone 50 1 by the bolts 23 and extending inwardly to form a shelf to receive the material from the passageway 8 so that the heavier particles can be thrown out against the flange 24 by centrifugal force, the lighter materials passing into the chamber 18 through the throat 25 and through the medium at a suitable point for further treatment.

of the fan blades are blown out through the out let of the refusechamber I8.

The concentrates are received in the concen trate chamber formed by the shelf 2! and the I flan'ge'or ridge 24 arrests the outward movement of the'concentrates so that they form an angle indicated by dotted lines 26. The floor or flange 24 extends a suflicient distance beyond the cone 7 to provide a valley or trough circular in plan to receive a concentrate receiving plow or slicer 10 27 which is adjustably mounted by any suitable mechanism so that a cut of any desired depth may be made. It is to be understood of course, that the material is rotating against the stationary hollow plow 2'! so that the concentrates will be 15 forced up into the plow and carried off to a suitable location to be further treated. By making the member 2? adjustable to permit it to enter the concentrates at different depths any percentage of concentrates can be taken off and inasmuch as the material will drop on the floor or shelf 22 it is obvious that the concentrate chamber will be constantly supplied with the heavier material so that it will be always full during the operation of the machine. 25

It is to be understood of course that the material will be fed into the inlet cylinder 9 in any appropriate manner; that the concentrates will be recovered through the hollow plow or slicer 21 and the lighter materials passing through the throat 25 will be discharged through the refuse chamber l8. It is to be noted that the floor 22 of the concentrate chamber is bent downwardly as at 28 to overlap the upturned edge 29 of the top plate 30 of the refuse chamber so that the refuse material will be directed into the refuse chamber l8.

When the parts are assembled and the machine is operating the material being fed into the machine will be acted upon by gravity and also by the air suction created by the fan. The fan will cause an agitation of the material so that the lighter particles will tend to be separated from the heavier particles to be drawn into the refuse chamber. The heavier particles however, striking the shelf 2! will be acted upon by centrifugal force to overcome the suction of the fan so that they will be thrown out against the ridge 24. They will therefore collect in the concentrate 5O chamber and due to the fact that the concentrate chamber is rotating against the mouth of the plow or slicer 2! the concentrates will move into the hollow tubular plow or slicer 21 to be collected What we claim and desire to secure by Letters Patent is:

1. In a device of the class described, a pair of independently rotated cones in spaced relation forming a passageway, means for delivering material into the passageway, a concentrate chamber carried by one of the cones, a stationary refuse chamber below the concentrate chamber, a fan therein rotating with the other cone, the refuse chamber having communication with the passageway and a hollow ofitake member having its inlet in the concentrate chamber.

2. In a device of the class described, a pair 'of cones in spaced relation to provide a passageway, means for independently rotating the cones, means for delivering material into the passageway, a ring member substantially L-shap'ed in cross section having a horizontal flange in spaced relation with one of the cones and carried thereby, and another flange forming a circumferential ridge to prov-idea concentrate chamber, a refuse chamber below the passageway in communication therewith and a suction fan in the refuse chamber.

3. In a device of the class described, a pair of cones in spaced relation to provide a passageway, means for independently rotating the cones means for delivering material into the passageway, a ring member substantially L-shaped in cross section having a horizontal flange in spaced relation with one of the cones and carried thereby, and another flange forming a circumferential ridge to provide a concentrate chamber, a refuse chamber below the passageway in communication therewith and an exhauster cooperating with the refuse chamber to create air suction in the passageway.

4. In a device of the class described, a pair of independently rotated cones in spaced relation forming a passageway, means for delivering material onto the passageway, a concentrate chamber carried by one of the cones, a stationary refuse chamber adjacent to the other cone, a fan for the refuse chamber, the refuse chamber having communication with the passageway, and an oiftake having its inlet in the concentrate chamber.

5. In a device of the class described, a pair of independently rotated cones in spaced relation forming a passageway having an inlet for material to be treated, a rotatable circular concentrate chamber at the discharge end of the passageway, a refuse chamber with which the passageway is also in communication, and an ofitake having its inlet in the concentrate chamber.

6. In a device of the class described, a pair of independently rotated cones in spaced relation forming a passageway having an inlet for material to be treated, a rotatable circular concentrate chamber at the discharge end of the passageway, a refuse chamber with which the passageway is also in communication, an ofitake having its inlet in the concentrate chamber, and an exhauster for drawing material from the passageway into the refuse chamber.

CURTIS C. BALDWIN. VERNE S. MILLER. 

